Hi Truscott,
Welcome to IIS.
What can I say but, read all the above. Ken made a very good suggestion in that you buy 2. One for home etc etc...... (a 10" DOB would be a good choice).
PTN. As acropolite,(Phil) has stated, optically the LX90 & LX200's are the same. Mechanically they are not. LX90's have aluminium gears as against brass in the LX200's, + a few other goodies.
HTH.
L.