Well it was a pretty tough toss up between the 707 and the 727, but I'd had my eye on the 727 for about year or so.

I also have the FS Labs Concorde which uses the INS, although I've sorta skirted around its INS systems by adding the default GPS nav to it. sssh! ;) That aircraft is just one big monster of new things to learn!

But back on topic - did my first (attempted) flight last night from KCVG to KDTW (Cincinatti to Detroit) - about 2/3rds into the flight I got distracted and forgot to watch my speed. I ended up overspeeding the 727. DOH! Thank God for sims, we can always just reload our flight, and try again. ;)