i used a zoom unit successfully for many years ( hopelessly out of date now) but depends just how much you need in the way of fx. like ian i realized i don't need that many and only used five or six patches when i was playing.
even my basic zoom had several amp sims and cab options. the unit i always fancied but never bought is the behringer v-amp.............
The V-Amp is pretty cool as are many things these days but a good cabinet I/R in the DAW makes a huge difference to and DI'd guitar. It's an improvement on the Behringer GDI21 I bought...their 1st rip off of the Sansamp - almost exactly the same - down to the noise issues - with Tweed, Mesa & Marshall represented quite well. A solid box and pretty reliable. I still use it when tracking with my Mel9 'Tron pedal...guitar -> compressor -> spring reverb pedal -> tweed clean with the highs n lows rolled off a tad then -> the box with some more reverb to soften it and an I/R of a Greenback edge miced with a decent condenser. It does that job better than a real amp.