My main amp is a Line 6 2 x12 150watt stereo modeling amp. It is dead reliable, loud and never gives me any trouble whatsoever. It gets used daily, stereo output and I can even download patches directly into it from Line 6's website. All in all, a great amp.
However, it can't come close to the warmth of my other amp, a Fender Deluxe Reverb. This amp is temperamental, yet gives one of the richest sounds you could ever hope to have. It does only ONE thing and does it really well. It seems like I'm always having to do something to it as well (tubes, reverb tank, caps..) but there is something about these old amps that is magical.
The analogy of the Focus vs. DE car is right on. Thats how I'd be looking at this.
BTW, I second Rick Lee's opinion (in the other thread) of the Hot Rod Deville. That's a killer amp too..