130vp-p isnt that little. You could do a little better, sure, but if you think there is an interesting reason to try it, try it. There is more to life than 15Kvp-p voltage swing....
You may like the results from using the 12V filament supply for the input tubes as a -12Vsupply and running a simple SS CCS to it. It saves a tube and a few caps...
Why 12ax7?
You have one negative feedback point indicated, but nowhere for it to go.
If its going to run open loop, and you will only get ~130Vp-p out of it at most, why not just use 12au7 for the inputs? In a long tail pair you can get freakishly wide bandwidth out of 12au7 and it should drive the 2a3 nicely.
Maybe one of the "middle ground" tubes - 12az7 has always intrigued me for high gain and low Rp, although I have never used one.
Wire the cathodes of the output tubes in parallel directly on the schematic. Skip those resistors between the 2 of them. It wont happen without about 5 heater supplies anyways...