Need Tyres for a Panda

[dpbird90]

Had a flat on my Fiat Panda (2004 1.2 Dynamic), luckily the Panda has a full size spare so I'm currently using that, although looking at my tyres it may be worthwhile changing them soon, as they're wearing down a bit quicker and they are all some budget brand (fitted by the previous owner, the front ones are different to the rears, but the spare is a brand new Continental). All they tyres have the size 155/55 R13 on them. although I'm struggling to find them in this size. Been on blackcircles.com and they reckon the Panda uses 155/80 R13. In this case I have some options, all of which include fitting;
Firestone F590 at £39.36 each
Hankook Optimo K715 at £39.72
Goodyear GT-2 at £43.59 each
Continental Eco Contact 3 (I believe the spare is this) at £45.97 each
Pirelli P3000 at £46.30 each
Michelin ENERGY E3B GREEN X at £49.94 each

There are more tyres both cheaper and dearer than this, but I can't afford more than £50 a tyre and the cheaper ones, as I've found out, are ste. So, two questions;
Is the size that blackcircles is coming up with correct?
Which of the above, or otherwise, should I choose?

Thanks

[dpbird90]

Anyone with advice?

[Unleaded Only]

Definately not the Continental Eco Contact, fitted as standard to my moms 1.2 Panda Dynamic. They're st, stay away! She have just got some new tyres on, will check when I visit her later this week, which are much better.

[Dan Friel]

I believe blackcircles has the right size (check the handbook?). Can't make a recommendation other than to spend as much as you can.