I am glad you did find the links to my SoundCloud.
Not sure when you looked if you saw the recent ones I listed. Incase you didnt hear them, the links are below.
Spector compare by Limaguy on SoundCloud - Create, record and share your sounds for free
Spector NS2A by Limaguy on SoundCloud - Create, record and share your sounds for free
Spector ReBop by Limaguy on SoundCloud - Create, record and share your sounds for free
WalkingBass by Limaguy on SoundCloud - Create, record and share your sounds for free
Now here is my input.
Keep in mind if you get a NS-2A it may have a little issue or a big issue since something that age is never going to be in "perfect" shape. example: I got a NS-2A in May and it had a nut issue, not a big deal I replaced it. The NS-2A i recently got had a input jack issue and the battery terminal broke off as soon as I went to change the battery. Also not a big deal I replaced both. But be careful it could be something worse like a neck issue.
With that being said, I think a NS-2A is one of the best deals for a Spector. As JPS said a NS-2A over $500 is overpriced.
One of mine was $500 and the other was $380. As you proabably have seen the there are some NS-2A's way overpriced on ebay, craigslist etc....
Before I got my ReBop I saw everyone talking about never getting the right tone and then everyone talking about upgrading from the HZ-EMGs active EMGs. (Now that I own it, I understand why.)
In the recordings I did get a decent sound out of it. But when I play through my amp I either get too muddy of a sound or I get way too much crisp high-end. It seems to be lacking in the mid range area. But you mentioned this is kinda what you are looking for so it may be good for you.
I got my ReBop for $675 on a local craigslist sale. It is a 2004DLX in Mint condition. You cant find a scratch on it. The previous owner just played at church gigs every week.
Just curious, where are you located?
and what type of music do you usually play?
If you want I can do a another recording for you, if you want to hear any other style of playing being compared between the NS-2A and ReBop.
The ReBop neck is bit wider and thicker then the NS-2A's necks.
And I am sure you can see in the photos how the ReBop neck gets wider as it gets towards the bottom of the neck.
Not sure if you are into Slap style, "I am just getting into it and getting my chops up" But the NS-2A's IMHO are not great for slapping. I get much better feel and tone from the ReBop and Euros for slap style.
Now after all this info, not thinking money, if someone said to me, would you like a 2nd ReBop or 3rd NS-2A. I would take a 3rd NS-2A.
Hope this helped some and didnt confuse you further.
Feel free to send me a PM to discuss further.
Also, not sure if this is still avail but here is a ReBop at a great price. Invalid Link Removed
Oh no, that makes perfect sense, and it really does help clarify some things. I had planned on upgrading whichever bass I got eventually, and like I said, the NS-2A has newly installed active EMGs, which is definitely a plus. However, I thought the tone sounded a bit too punchy for my tastes...and the more mellow tone of the Rebop seemed be more appropriate for the music I generally play. I like a bit of everything, but most of the time I play progressive music, with a bit of metal here and there. I also quite like jazz music, and while both basses would probably work there, I think a Rebop has a warmer sound that suits all of the above quite nicely. Not too interested in slap, though it's fun to mess around with now and again. I was thinking of stringing whichever bass with DR Sunbeams in order to get the flatwound sound with the versatility of roundwounds.
I'm in southern Florida, by the way -- kind of out in the sticks, actually, so local craigslist hasn't turned up much. There aren't any Spector dealers within 100 miles either, so used options are pretty much limited to eBay and scouring TalkBass classifieds. I'm leaning more towards the Rebop right now, but I'm keeping my options open for now.
This all helps tremendous though, thank you!
EDIT: Just noticed that the NS-2A I was looking was just bidded on not long ago; now its approaching $500 fast. Well there goes that plan!
Everyone was exhausted! 
