Honestly, a good recording at 44.1 will sound better any day of the week to a bad recording at 96k or 192k.
As for the interfaces, I would actually recommend the new M Box. They work really well with Pro Tools, but they have been written with a universal driver that works really well with any ASIO software (FL Studio included) unlike the old M Boxes. The bonus here is the new M Box sound quality of the electronics are on the level of things like the Apogee Duet and some other higher end interfaces.
(800) 222-4700 Ext 1317
(260) 432 1758 Fax
andrew _ malloy @ sweetwater . com
Office Hours M-F 9 AM to 6 PM Eastern