The 340i is 100 watts into 8 ohm, 200 watts into 4 ohm - sufficient to work with my Thiel CS3.5's - at the level I listen at. The Sim is a very good integrated. Comparing it to my Pass Labs X150.5/B. A. T. VK3i setup remains a work in progress, but I don't feel I've truly lost anything in the switch. The Sim is a tad "warmer" than the Pass was, but Pass has been noted to be too analytical by some. Not I, though - pairing that with Thiel which has also garnered similar opinions was a sweet match.
I just bought a pair of Thiel CS 3.6 which are replacing my 3.5. - the only way I would ever get rid of my Thiel.
You have a very enviable budget for your return to this madness. I suggest sticking with the Neo and deciding if the trade up program they offer is worth your while. My MC275 amp blew a tube in the first 14 days of ownership and my experience with their customer service was abysmal. I sold it within a week of that.