Thank you guys for your opinions!!!
Looks like 120 is way to go. I'd probably take some more time (and advices :-) ) before selecting one. If I go with 120 model (i.e., 70" size), what would you suggest for engine - 120 size glow (OS) of 26cc gas (SPE26/MLD-28 may be available). Again, since I plan to go to 50cc size (I'm serious about it so far...) in a 1 yr or so, I see a spe26 or dle30 not a very good investment. I know I'm just too much thinking about redundent investment but money matters (poor resale of used model :-) in case I need to get rid of few of them).

I searched the forums a lot and what I noticed that that everyone seems to be putting higher than recommended (or the higher end in recommended) size engines - 46 is replaced by 55/60, a 60 by 90, a 90 by 120/160!!! And here I am planning for 91 in 90-120 size model.

Peak models at my LHS would be back in stock around month end. I'd again bother you with some selection queries
(yak/edge/SU :-) ) along with exact specifications of the models.

Thank you.