+1 for Cowells. Not that your lathe choice is a democratic vote 
Mine is circa late 1970s and I like it a lot. The Taig/Peatol and Sherline are also decent machines but being in the UK, it seems less of an uphill struggle for me to have something from this side of the pond. I do use backgear on occasions on the Cowells which neither the Sherline nor the Taig has. I also do thread cutting – which I think is possible with Taig and Sherline but not sure if they need more bits to be bolted on.
With an M14 x 1 spindle you have an absolute hatful of workholding choices there. Cowells now do a different (DA?) collet system I think. I've seen good words about it but have no experience myself. You could use ERxx if you want – for example Arc Euro do ERwhatever holders and part machined backplates for M14x1.
Toolpost wise the standard one takes 6mm or 1/4 inch tooling but Cowells do a little QCTP to suit.The rear parting toolpost is also well worth having.
The tapers are modified MT0 – modified in that they use the thin end so you need to buy centres and tailstock chucks from Cowells. Some people fit standard MT0 bits but they stick out too far and look awful.
I think my biggest qualm is with the plain bearings which need topping up with oil. Said oil eventually seeps out into the middle or either end of the headstock.
No idea what the lead time is for new orders but sounds like it may not be short.
On a more subjective note, does anyone else think the Taig looks like it was designed by a committee?
Good luck, whatever option you choose.