I was always intrigued by the idea of a 5. Especially since I play P&W music. Once i got to a playing level where I would actually incorporate the B, and not just use it as a thumb rest, I dove in. Ibanez seemed to be the logical plan because I had been playing a PJ with a jazz neck. The SR that I chose was not much wider and very do-able. Was not not long that I was grabbing low E, F# at the 7th fret, low G, low A, the D on the E string right across from it... At one point I tried a Schecter at GC because, that's what you do... The Schecter was just a smidge wider and played well b/c it was used and (miraculous) decently well set up. I decided to go home and cool off. Impulse buys will get you every time. I waited a week and it was gone. Of course it was. looking back it was a good bass and got snapped up like good basses do... I had the good fortune to get an elite 5 neck thru and still have it. At this point i flip between that bass and my VM Jag 5. Necks are completely different and I go back and forth on which one i think is better. Definitely a moving target. The Schecter is a narrower neck, and has a flatter radius, and is 35", but overall a shorter bass. And lighter. The Jag is super comfortable to play. Radius is more arched than the Schecter and the neck is an inch shorter. I do know that it totally messes me up to play a 4 now... I can play a 4, but there are certain things that involve the B and it's easy to get rolling and then, oh, speed bump, when you're going up the neck angling for the A and remember there is no A down south on a 4, well not the one you want anyway....
Thanks for letting me ramble. Hope something in there is helpful...