There's a lot of posts on quality AIs. Use the search function.
Here's a post where I have made a list out of online reviews:
https://www.futureproducers.com/for...are/recording-through-audio-interface-477329/ #3
Here's a commercial review list:
12 of the best budget USB audio interfaces | Focusrite Scarlett 2i2 | Tech News | MusicRadar
At the 250 bucks price range, they come with some flaws. Flaws seem to disappear more at the 500 bucks price range. Like the Apogee, Motu or RME babyface.
Too bad the Mbox one that came with PT express isn't available anymore, as that one had pretty high reviews on the converters and preamps.
My preferences at this moment would be, in order of best to worst (what I deducted from online reviews, so, very subjective):
- RME, Motu, the one's around 500 bucks mentioned in this post
Then for half that price
- Mbox, if you can still find it, Steinberg (very good reviews on the converter and preamp, can have driver issues)
- Focusrite scarlett, mackie onyx, tc impact twin, NI komplete audio,
As I said, the list is very subjective. There's a lot of talk around that converters and preamps in the 250 bucks price range don't differ that much. They all come with their flaws. You get the better results in the 500 bucks price range.