I have the PMDG 737 - 600-700. Was thinking of buying the 700/800. Any Real differences in them other than of coarse longer, more pass, ect. ? Thanks

The 800/900 updates the 600/700 panels so both now have the same features such as TCAS and I believe extensions to the FMC features. I actually bought two standalone packages from Aerosoft on CD a few years ago to avoid the vagaries of download problems.http://www.aerosoft.com/cgi-local/us/iboshop.cgi?showd80!0,5705865860,11787Will give you the four models on the CD. While the description states that TCAS is only on the 600/700 on for support purposes registering the CD key with Aerosoft will take you to an FAQ/patch page for that product I would imagine. It did for the individual CDs.Some on-line pilot shops are selling it as well, maybe some retailers.If not already implemented on this package with one install, you may have to install cleanly following certain steps for each pair. I'm not sure if the installers were redone.