My boss is planning to replace his bookshelf fronts and we were discussing how these two products compare? I recently received a new pair of the Monitor 40s Series II and have no problem recommending them, but can't comment about the TSi200s.
When I was shopping, it seemed they spec'd out failry closely. Pricing of the 40s at Newegg - as well as the 40s being magnetically shielded (placement issue) made the difference for me.
He is replacing blown speakers (I think Infinity brand of similar size) they use for their HT - but, he's a Deadhead and plays them loud (apparently too loud when alone) and expects performance similar to his current speakers.
All input appreciated.