+1 on the T-Rex Møller. The current "version 2" of the physical pedal can go for more than USD 200), though the AmpliTube model of version 1 is very good -- and considerably cheaper!
The Møller is (AFAICT) essentially an enhanced Tube-Screamer-type pedal with a clean boost. (Tube-screamer-type pedals are very frequently used as slightly-unclean-boost pedals, with the drive control down, the level up, and the tone tweaked to taste.)
Otherwise, if I were going for a Tube-Screamer-type pedal and had a budget, I would totally get one of those Keeley-modded or Analogman-modded ones. I think the Keeley-modded TS is now basically encapsulated in the Keeley "own brand" Red Dirt pedals. Still, even the various fairly stock and new Tube-Screamer types are useful.
It's also hard to go wrong with Boss pedals, IMO -- though I'm not a fan of the Metalzone either, preferring the old HM-2. (Besides all the Swedish deathmetalers, even Dave Gilmour and Jerry Garcia also used the HM-2; it's more versatile than one might think!) But the DS-1, the SD-1, actually the Blues Driver, too ... they're all solid, dependable, and versatile.
For that matter, the Fulltone OCD pedal, which AmpliTube also models, has many aficionados, though I'm less familiar with it.
I'm really more a fuzz fan.
I have a physical old "Russian" EHX Big Muff from the early '90s, and my go-to in AmpliTube is the Big Pig (even though AmpliTube categorizes it as "distortion" rather than "fuzz"). But I'll often set up different classic-era amp models as fairly clean and audition different AmpliTube fuzz models through them, or multi-track in Logic with different clean-ish amps and different fuzz models.
Some day, when my current audio interface dies, I'll get the AXE I/O and finally set up an expression pedal to try out the AmpliTube wah models properly. I have a physical Thomas Organ Crybaby and a stock Dunlop Jimi Hendrix, but my holy grail would be the Colorsound fuzz-wah from the early '70s. Those things
rip. There are some nice clones of those you can get, but they don't come terribly cheap (especially with my local currency's presently awful exchange-rate against the dollar!).
I can't say that I've compared
all the AmpliTube Orange amp models to the "real things"
(and I don't think I've ever even personally
seen an OR120 in decent shape, though they are out there), but as a user of the AmpliTube models, I will say that I like them a lot.
The AmpliTube Rockerverb model is in my "default" patch when the AmpliTube standalone app loads up and in my go-to user-channel-strip guitar preset in Logic Pro. (Even when I'm using MIDI in Logic Pro, the sampler pumps the guitar stuff through AmpliTube.
) If I did find an OR120 (or a clone) and had the money to buy it (and the soundproofed bunker in which to play it
), the AmpliTube model has me pretty convinced that I'd like it.
If I could justify it, I would absolutely get a physical Rockerverb MkIII; only a few years ago, Orange stuff was utterly unavailable in the country where I live, though some dealers now carry it. Still, much as with the Tiny Terror, even if the Rockerverb 50w is switched down to 25w, it's probably still
insanely loud. But that's not a problem in AmpliTube, where I can happily run even the model of the Thunderverb at full blast!