If you do go the SV route you can
buy direct from Stellarvue themselves. You can also buy the same SV90 in an aluminium tube with the feathertouch focuser for US$1995 saving a couple of hundred dollars (it is only one and a half kilos heavier, and if anything, the aluminium will help with the scope cooling and it will reduce focus shift for imaging). You will also get unsurpassed help from Vic Marris, the owner of SV himself, should you ever need it.