While I don't use my Juki for quilting, I bought mine strictly for piecing and I have to say I LOVE this machine!
But don't get the TL98Q, the TL2010Q is out now, and has a couple of very nice improvements on it, and if you call Les at Ed Raichert's:
http://www.raichert.com/azsewingstore/t-combopage3.htm
You can get it for $750.