I would _highly_ recommend the JVC. It too has 3 sets of 4V pre-outs. And as far as I know, it would be impossible to hear the diffence between JVC's 102dB S/N ratio and another company's 105 dB. Once you get that high, the weak link in the chain (i.e., the noisiest component) will be further down the line.
I have the KD-SH77 in my car, which is the same as the SH99 except for the MP3 capability. If you want to see a picture of it in my dash, check out my website link below. And notice while you're there what the trophy says...

Trust me, it is an excellent deck.