The LP70s is a better amp which includes better components (Teflon caps and Vishay resistors). Its more comparable to the Classic 60 SE in performance. It also looks better with a very nice case work.
Regarding the Classic 60 SE it should be all but roled off in the highs. It does need a lot of burn it to come to song (500 hours minimum). Because the Classic 60 SE uses teflons as coupling capacitors vs. the Classic SE preamp which uses teflons to bypass polyprop capacitors it takes a very long time to break in.
If you get a used LP70s you will save yourself the long break in time.
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