About 6 months ago I switched over from some other brands to Ibanez after a few much more talented friends of mine noted how fine their new guitars are becoming! I play 4 string electric bass in numerous jazz & latin groups through a polytone combo amp. I gig about 3 times a month. Anyway, I played the SRX500 and SRX700. Comparing and picking between them... it really depends. They are both great. I think the 500 is appealing because it has a "wax finish" natural wood neck. Some people really dig this because it doesn't get "sticky" when you play a lot. It's a bolt on and as such, the upper register feels a bit different. It also may be a tiny bit (1/4 - 1/2 pound lighter). The SRX700 is a neck through and has laquer everywhere (on the back of the neck). You can tell it's a very high end bass and it's quite good looking too (although I certainly didn't buy it for that!). In fact, I get a surprising amount of comments on how good it looks. The neck profile may be very slightly different between the basses because if i play one for a few months and switch over, it always feels a bit off at first. Anyway, I use a 700 as my main bass and a 500 as my backup. They are both super basses. I suppose it really comes down to the whole neck-through, laquer finish and appearance choices. I believe the pickups are slightly different but I have never been able to tell a significant difference in tone. Perhaps the 700 is a tiny bit deeper sounding, but my ears may be deceiving me. You just can't beat these instruments. All the time I play with people that have boutique $1000+ basses and it's amazing how many looks I get when they actually hear me playing. Some guy the other day had this 12 pound warwick 5 string bass and I knew he was really digging my bass (and dealing with an aching back!). As an aside, I noticed that some of the notes on my 700 started buzzing after I had the bass set up recently. I think this requires a minor tweaking to the truss rod, correct?