I got the MX300 525GB for a little over 150 euros, because the BX model isn't available in my country, and probably won't be for months. I didn't even open it yet or try it out. My ADATA SP550 250GB serves me well enough, it's plenty of space combined with HDD's.
In the near future I'm probably going full SSD's in my system, simply because 7200rpm drives are sometimes louder than a case/power supply fan, it's a sacrifice for having over 160-200MB/s read on a 7200RPM HDD, but the noise is a deal breaker.
GG those when I have to install a 20-50GB worth of game data.
I think the BX model has more overprovisioned space tho. That's why it's only 480GB usable. Dunno if Crucial has a software implementation to manage overprovisioning yourself, though I did see somewhere that simply leaving space unpartitioned would work the same way.
To overcome mechanical disk noise issue, network attached storage is IMO the way to go. Get a NAS, stick it in another room where noise isn't an issue and fill it with spinning disks, connect it with ethernet to your house's hub, job done.
Considering the maximum throughput of 1GbE is around ~125MB/s, which is pretty close to what spinning disks can max out at anyway anyway (and the bottleneck with these is generally random I/O, so rarely will you even hit that speed), even a single ethernet link should suffice (assuming you aren't using to RAID-0/RAID-5).
This Tom's article (from 2009, so old, but still relevant) explains that they found the same in real-world testing.
When we (finally) get 10GbE integrated in consumer products, a single link of that will allow over a GB/s of throughput, which means even a RAID setup of spinning disks will be catered for.
Here's an article from a guy who made the jump, it wound up costing him around ~$120. If you want/need to add a 10GbE switch to the equation however, that will cost upwards of $200.
If I were building a 10GbE home network, I'd probably go with a pure 10GBASE-T setup via the ASUS XG-U2008 switch (~$220 on Amazon with a $20 rebate) plus a pair of ASUS XG-C100C cards (~$115 each), you will probably be able to find them cheaper elsewhere or second-hand. The bonus of this is that if your house is already wired with Cat5e, you can reuse that and don't need to run new optical cables like you do with the SFP setups that the linked articles used.
