New Build Plus Questions

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I may shortly be upgrading my Q6600/Ati 5850/4Gb RAM system to one with a bit more grunt, which I hope will last me 5 or 6 years. Unfortunately, finances mean the odd compromise, possibly even the entire build itself

I would like to base it on this bundle from OCUK

Intel i5 4670 at 4.2Ghz
16Gb RAM (I'm looking to the future with this)
Asus Z87-K Intel Z87 (Socket 1150) DDR3 ATX Motherboard

Paired with a Radeon 290 such as the Sapphire TRI-X, a cheap as possible 24" monitor that is still ok, a cheap as possible SSD of 200GB+ capacity.

I'm content with the CPU+GPU+RAM, but the costs of the other items are pushing what I'd like to spend. So, a little few questions I'd value some input on:

1. I have a decent, new 2Tb HDD already. Will I totally ruin my PC experience by not having an SSD to save money?

2. What's the best 24" monitor in the sub-£150 bracket? Presumably they are all 1900x1200

3. Is there a cheaper mobo than the one in the bundle above that will allow an easy overclock on the CPU? I'm not really a power user of motherboards, but would like decent onboard sound if possible.

4. Is there any decent compact case that this would all squeeze into? I realise the graphics card is pretty hefty.

Cheers for thoughts on any or all of these questions.

 

[Squink]

Cheers - I was quite worried on question 1. I have also seen (and very much liked) those Bitfenix cases. I've got a massive old Silverstone case at the moment. The door flaps open and the side panel falls off. It's been a bit cack from the outset to be fair, so I'd like a new case that'll last for the foreseeable.