If you practice in the same room as your computer and don't need to take the modeler other places or plug into an amp, then get a toneport GX. I have one and rarely turn my amp on anymore, especially since I have to wear headphones at night while my family is asleep. It is easy to dial in tones and recall saved tones, easy to record with, sounds great, and the Guitarport online lessons are interesting.
Guitars: MIM Fender FSR Limited Edition Stratocaster with direct mount pickups, Schecter C-1 Plus, SX SST57 Powder Blue, Alvarez RD8 Accoustic
Amps: Line6 Spidervalve 112
Effects: Digitech Bad Monkey, Danelectro Cool Cat Chorus, GFS Delay, GFS Tuner, Behringer HB01 wah, Line6 Toneport GX, GuitarRig 3