I've had my TA-15 head for around 3 years now, I use it primarily as a backup to my Lonestar Special 2x12, although I do use it with two 1x12 Lonestar cabs loaded with Black Shadows for smaller gigs relatively regularly. While there's a wealth of fabulous sounds available with this amp I've found myself largely sticking to 15W both channels, using Normal mode on Channel 1 set to nice VOXey chiming clean, and Channel 2 on H1 for a nice Plexi-style crunch. I play Strats exclusively these days, and I've got to say between the Lonestar Special and the TA I think I've found the perfect amps for single-coils: initially when I moved from EL34s (Marshalls) to '84s (VOXs) I didn't really like the way the EL84s were a little indistinct in the mids, but I loved that bell-like halo they give to stratty trebles... also they can really get angry when pushed, where the "boxy" mids get wonderfully ragged. I've got to say that I'd got perfectly happy playing VOX AC-style amps for a few years until I tried the Lonestar Special, and then it was love at first play...
- BUT -
The TA-15/30 are, to my ears, the best sounding classic (JMI era) AC15/30 clones out there! Ok, I've not played a Matchless, or a few other super-high end and boutique AC-a-likes (like you I'm a brit, but I live in South Africa where the stores don't stock everything like you can see in, say, Denmark Street and Charing Cross Road). I rather wish the Top Boost mode was available in Channel 2 though, I understand, in very basic terms, why it isn't given the versatility that's built-in to the TA by design (each channel has a completely different preamp design and tone stack), but I would love a footswitchable Normal and Top Boost twin-channel amp in the TA-15 head format, with built-in reverb or an FX loop, then it would be, to me, the best sounding, best-bang-for-buck, most convenient form-factor amp available to humanity!