good info mista. I read an article a while ago (by llewellyn I think) in MD discussing the use of AIs or SERMS in the long term. As you have mentioned SERMS were shown to have a positive affect on lipids but less dramatic increases in test levels. AIs showed greater test increase but after a while also showed negative affects on lipids, this the writer believed was a reult of very low estrogen levels. Very low estrogen levels have also been linked to lethargy and tiredness. Definately food for thought...
Personally I am very interested in the idea of running an AI between cycles.