need 2 x tyres and undecided which ones to go for

I currently have Toyo Proxes T1-R all around but like people have said at speed they do feel a little "wobbly" which I guess is down to the sidewalls? I am going to put the two I have remaining (which still have loads of tread) on the back
Im running 205/45/17 on OEM rims. Looking through some people are running 215/45/17 -are there any benefits to this? I'd guess theres more surface area on the road so improved grip, less chance of curbing but possibly reduced MPG? Probably negligible though

The 215's also seem to be cheaper too. Would it be ok to have 215's on the front & 205's on the rear?
Looking at this thread it seems to be between Bridgestone Potenza RE050's & Continental Sport Contact 3. A google search has brought me with the following options. There are so Many options available so I may have selected the wrong rating etc so if you could point me in the right direction for any errors I’ve made it would be greatly appreciated!
I am looking at a bit of an all round tyre that handles well and is grippy for fast road yet also does not wear too quickly, I’ve read the conti sport 3’s do wear quite quickly? So possibly the potenzas RE050's might be the best choice?
BRIDGESTONE TYRES / CAR / BRIDGESTONE RE050 POTENZA BRIDGESTONE RE 050 - 215/45R17 87W TL
http://www.camskill.co.uk/m54b995s15p58 ... oupe/RS_GB
£107.70 (inc Vat)
BRIDGESTONE TYRES / CAR / BRIDGESTONE RE050A POTENZA BRIDGESTONE RE 050 A - 205/45R17 88W XL TL
http://www.camskill.co.uk/m54b745s457p1 ... _88W_XL_TL_
£130.60 (inc.VAT)
CONTINENTAL TYRES / CAR / CONTINENTAL SPORT CONTACT 3 CONTISPORTCONTACT 3 - 205/45R17 88W XL FR TL
http://www.camskill.co.uk/m54b1066s457p ... _TL_/RS_GB
£122.90 (inc.VAT)
CONTINENTAL TYRES / CAR / CONTINENTAL SPORT CONTACT 3 CONTISPORTCONTACT 3 - 215/45R17 87W FR TL
http://www.camskill.co.uk/m54b1066s15p6 ... _87W_FR_TL_
£106.80 (inc.VAT)
FALKEN TYRES / CAR / FALKEN FK452 FALKEN FK 452 - 215/45R17 87Y TL
http://www.camskill.co.uk/m54b443s15p0/ ... 15_45_R_17
£77.70 (inc.VAT)