You might get better responses posing these questions in a forum focused on home theater, like AVSforum.
I'll share some of my thoughts on home theater.
Get separates - separate amp(s) and pre-pro. Sound quality should be better and a good amp(s) will last a long time. The features and video and audio formats change or get upgraded so often that pre-pros become obsolete quickly and lose their resale value even faster.
SVS is a good choice for home theater subs. So are Rythmik and PSA. You can often find good deals on used subs, around 50% from buying new. In my experience, subs have been pretty reliable. All but two of the 8 that I currently own were purchased second hand and all are still going strong. The ported subs you chose will have more output than their sealed equivalents and are a good choice.
Your mains and center channel are more important than the surround speakers, allocate your budget accordingly. If you are putting together a surround system, the center channel is where almost all the dialog comes from.
I'm not familiar with the speakers you mentioned. I'm using Harbeth Super HL5 Plus speakers as my mains. Not sure if they'd fit in your space, but they aren't very big and can play loud. My system is focused more on music, but the Harbeths do great with movies.
Don't go to Best Buy to audition equipment or get advice. If you mention where you live, other posters might be able to offer advice on reputable dealers you can visit.
I'll share some of my thoughts on home theater.
Get separates - separate amp(s) and pre-pro. Sound quality should be better and a good amp(s) will last a long time. The features and video and audio formats change or get upgraded so often that pre-pros become obsolete quickly and lose their resale value even faster.
SVS is a good choice for home theater subs. So are Rythmik and PSA. You can often find good deals on used subs, around 50% from buying new. In my experience, subs have been pretty reliable. All but two of the 8 that I currently own were purchased second hand and all are still going strong. The ported subs you chose will have more output than their sealed equivalents and are a good choice.
Your mains and center channel are more important than the surround speakers, allocate your budget accordingly. If you are putting together a surround system, the center channel is where almost all the dialog comes from.
I'm not familiar with the speakers you mentioned. I'm using Harbeth Super HL5 Plus speakers as my mains. Not sure if they'd fit in your space, but they aren't very big and can play loud. My system is focused more on music, but the Harbeths do great with movies.
Don't go to Best Buy to audition equipment or get advice. If you mention where you live, other posters might be able to offer advice on reputable dealers you can visit.