I would like to upgrade from 433AH + XR5 to increase throughput on PTP links currently running on 802.11A considering running on N for PTP links and for sectors currently using XR5 + NV2, seeking practical advice on best board + radio cards for each option.

Hi
I think you don't need to change your RouterBOARD. Just change your mini-pci card to R5SHPn. With this change, you increase data rate up to 150Mbps. If you need more data rate and more bandwidth you can use any 802.11n card with 2 chain and required tx power; and use dual polar antenna.

DBii F50n Pro is a good card.

Would changing the board to RB800 or equivalent (is there equivalent to this board) also improve wireless throughput?

I really don't think so.

433AH is a pretty quick board.

How many mangle rules, queues, etc?

What is your CPU usage?

I really don't think so.

433AH is a pretty quick board.

How many mangle rules, queues, etc?

What is your CPU usage?

No mangle rules just dynamic queues from pppoe server, CPU 40- 60% approx (with V5.20 graphing is not working so hard to tell CPU load ?)

Just upgrade the cards to DBii F50N cards.

CPU will handle it

Just upgrade the cards to DBii F50N cards.

CPU will handle it

Ok will test DBii F50N