I have a shift, I've had a couple slow crashes, a 100mph lowside, and a 110mph highside in it, and it still kicks ass. It's about 20 lbs, comes with all the armor you'll need, great fit, awesome ventilation, and durable as crap.
I've been lucky to find a local old guy who repairs eurpoean bags... he's a beast. so far theres nothing I haven't done to my suit (or my buddies to theirs), that he hasn't been able to fix on the cheap..
Comparing Alpinestars vs Dainese, I prefer Dainese. The quality is a little better and the fit is better.... if you like snug. Alpiestars suits have plastic logos etc. vs leather for Dainese.I had the Alpinestars Race Replica and was disappointed with it. It was nothing more than SX-1 with elbow and shoulder protection "tacked" on to it....was too big for my size.
To get the better prices, check out Motorama.com in Italy. Make sure you know what size you want. Your Visa card may not work but Paypal transactions work. You can save up to 1/3..takes about a week to get your suit if they are in stock. I got a Dainese Aspide for just over $1100 (with shipping) vs $1500 (w/o shipping) for US prices. Oh, they sell all brands.