Which robot for pool with slopes?

I have a customer who came in recently that has a man made pool built many many years ago. The side walls and deep end wall slope down and so does the floor going into the deep end.

These are the robotic cleaners we carry:
Polaris- 9300, 3900, 380, 360
Aquabot- Turbo, TJet, Xtreme

She ruled out the 3900, 380 and TJet because she doesnt want a pressure cleaner that doesnt do the walls and doesnt want to spend the extra money on a booster pump. So the only options are Turbo, 9300, 360 and XTreme.

If you guys thinks none of those options would be good then be honest with me. I dont work to jip(?) people out of their money.

So i'm just worried they'll get stuck in the deep end or wont go all the way up the walls. (Besides the XTreme which i know doesnt go all the way up)

Thank for your help guys

My Blue Pearl does great on the slopes in my pool, never a problem climbing.

I can't help with real pool gear, my RoboClean does a great job on the bottom (only) of my 15' donut. I do want to direct you to the forum's Acceptable Use Policy at: http://www.poolforum.com/pf2/showthread.php?t=3339. There is a special section for pool industry insiders.

I've read that thread. I don't really know why you directed me there. It doesn't really apply to me. I'm not here to sell stuff. I'm here to learn and this website and people such as yourself have taught me a lot.
I work for Anthony and Sylvan in one of the retail stores so i'm not here to sell anything.
Thanks for the help though.