ORIGINAL: carrellh
I have seen the 40LA & 46LA used in planes that would typically have the 25FX or 32SX installed. The LAs are similar in weight to the small ball bearing engines. They are physically bigger though so planes with cowls might have issues.
I didn't know if you'd be more interested in an ARF or a kit but here are a few potential ARFs
Modeltech Magic 3D (definitely light enough for the LA, and no cowl)
Phoenix Sonic 25 Low Wing (no cowl)
Tower Hobbies Uproar 40 (no cowl)
Thunder Tiger Lazy Tiger P-51 (looks like partial cowl?)
These have cowls
Global ME109
Modeltech Extra 300
Global Tequila Sunrise
Considering his revised criteria "I prefer something that I can fly slowly and really practice feeding in inputs without the need to correct immediately to avoid crashing...", I'd say the best bet from your list is the Lazy Tiger P-51 and maybe the Sonic. While it's possible to fly the Uproar slowly, it's got no tendency to correct itself. I've got the MT Extra, and it's definitely not a slow flier. I've heard the same about the ME109 and enough people warned me about the Tequila's bad habits (tendency to snap at unexpected times) that I decided on the MT Extra instead.