I just got a 27" iMac with a 3 TB fusion drive, 16 GB memory.
What is the router and back up drive you suggest. You obviously know hardware so I'd appreciate the suggestion.
This is my home environment and I am an amateur Photographer and Videographer. Mostly my kids and I need a good reliable back up system that is AUTOMATIC. It cannot rely on me doing anything daily.
Thanks
Congrats on the new iMac! That's a great machine that will serve your needs well!
When it comes to separating your router and backup drive (coming from a Time Capsule) the first thing you need to ask yourself is whether or not you want the Time Machine Machine backup drive to be co-located with your iMac or co-located with your router (presumably in a different room).
If it is to be co-located with the router in a different room, the advantage is the backup hard drive is out of sight and out of mind, which means less wires and less things where your iMac is located. The disadvantages (which is not a disadvantage to most people) is that your Time Machine backups will be slower since they will be wireless vs direct-connected, but backup speed is of little importance to most people. The other possible disadvantage is setting up a remote drive attached to your router *might* pose a little work for those that are not technically inclined. But I'm sure you won't have much of a problem...and you have lots of smart people here that can help you.
If you co-locate the backup drive with your iMac, then setup is dead simple. Simply buy the external desktop hard drive of your choice, plug it in, and send your Time Machine backups there. As for what brand of hard drive to buy, well, its tough to say which one is best and that could be debated forever with no clear answer. I'm a fan of Western Digital, but that is just what works for me. What I can recommend is that you buy an external desktop hard drive (comes with its own power cord) and do not buy a portable hard drive (does not come with a power cord and is powered by USB). I also highly recommend that you buy a hard drive that is 4 times larger than the size of your current data. In other words, if you have 1.5TB of data, then buy at least a 6TB external hard drive to use for your Time Machine backups. Hard drives are cheap and a drive that is 4x larger than your current data will give you plenty of headroom to "reach back" and recover anything you need. To give you perspective on pricing, today you can buy a 6TB Western Digital External for $129 or an 8TB WD External for $159 at B&H Photo. You are likely to find deals about $20-$30 cheaper as the Black Friday deals start pouring in.
As for which router to buy, I will defer to those that are smarter than me on the latest and greatest. I have been using an Apple Airport Extreme for the last 3-4 years and am not up-to-speed on today's latest wifi router offerings. A lot depends on how much coverage and speed your house needs. I'm sure some smart people here can chime in and help you with that.
Hopefully this helps. If you're in the market for something new, I think you're doing the right thing by moving away from the Time Capsule concept and splitting your router and backup drive into two pieces.