Not familiar with the Apollo cards but they are highly regarded. I have an older USB RME babyface and I get very low latency into logic and use those amp plugins. I would think Apollo is up to par, they claim under 2ms latency through the DSP plugins. I love the TotalMix FX on the RME stuff... killer. And their drivers are second the none (RME).
For practice and recording, the amp software I'm sure is plenty fine on the Apollo. It's no cranked tube amp sound, but you can always re-amp the recorded line signal from the DAW track into whatever amp you choose then back into the DAW. That allows you to play with the amp settings and speakers options all day to get the best sound instead of being stuck with what you've recorded from amp speakers to a mic into the DAW, so I think it's a better way to record.