Best (new) fixed frame? Need to rebuild

Hi Guys, I used to be a forum regular but I've been elsewhere for the last couple of years. I'm back because I'm hoping for some good advice about a new track/fixed frame.

My beloved Giant Kronos [http://www.londonfgss.com/thread708-5.html#post27852] is giving up the ghost. The bottom bracket threads on the frame are corroded and stripped, and the last time I replaced the BB I got the bike shop to glue it in place with apoxy resin. I should've been more patient and got a threadless BB. The BB now needs replacing but I can't get it out of the frame, so I'll need to do a rebuild.

So far I've narrowed the frame choice down to...

• Bob Jackson Vigorelli [http://www.bobjacksoncycles.co.uk/product_info.php?cPath=28&products_id=307]
  
• Intec (used to be Fort) p1 track [http://soniccycles.co.uk/products2.php]
  
• Condor Potenza [http://www.condorcycles.com/potenza.html]
  
• Mercian Super Vigorelli [http://www.merciancycles.co.uk/frame_vigorelli.asp]
  
• Dolan Track Champion [http://www.parker-international.co.uk/4236/Dolan-Track-Champion-Track-Frame.html]
  
  

Not sure whether to go for alu or steel. Of the lugged steel framesets I prefer the Bob Jackson to the Mercian, but there's a 6-week wait I think. I've heard the Fort frames are good, and it'll build up to a nice light bike.

Anyone have any thoughts or other suggestions, or any experience of any of these frames?

P.S. The forks off the Kronos will be available if anyone wants them. They're 1inch straight bladed ITM carbon forks with an aluminium steerer. I haven't measured the rake, but it's about normal I reckon, so about 45mm. Drilled for brakes. Only trouble is that the steerer tube is cut fairly short (the head tube on the Kronos is only about 9cm, and there's a 12mm spacer), so your head tube would have to be no longer than about 105mm for it to fit.