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If it runs well with the features advertised, in combo with what is in 7, this is a version I need to buy, so hopefully it actually works.

Considering that it will install "Legacy Content", if you so choose, it should work just fine.
I haven't had any troubles with M4s either. In fact it seems to have cured the texture problem of Default M4 when rendering, see above.

"That government is best which governs the least, because its people discipline themselves."
Thomas Jefferson