Hello everyone my 1st post,please forgive my spelling and grammer.I have a few questions to ask. Wanting to start building a new ht system I'm about 50-/50 on music and moves I lisen to classik rock and jazz. Ihave a old Sansui RZ-7500av reciver and a pair of DCM timeframe TF600,hopeing to upgrade reciver to a yamaha RX-v663 I think my speakers are 6ohm can u mix 6 and 8ohm speakers? Will the 663drive 6ohm speakers?hopeing to up grade to a 5.1 speaker system when i can aford it. and I'm looking for a good subwofer for between 300 to 500$ to go with the timeframes till i can upgrade.Thank u for ur time and trouble in advance!