Tektro RL520 work well with v-brakes
I can only find two types of crosstop lever that are V compatible, the Pauls Engineering lever, £42.50 each from Freshtripe or the Tektro RL740, much cheaper but only available in the US via Rivendell bikes. That said I now have two bikes with v's and drops and I may not bother getting crosstop levers. Depends on what drops you use and how you set them up, but the hoods work well in traffic. You can buy the Pauls lever individually so maybe just get one for the top for modulating when riding there.
Gear shifting, I went with the Dura Ace 9 speed bar end shifters and I'm delighted with them, front shifting is much easier now. You can modify MTB shifter pods by filing the inside of the clamp and get them to fit round on to the flats of drop bars. I have a set of shimano 9 speed triples that I did this for and they work fine. However my drop bars are setup for a lot of riding in the drops so the bar end shifters are better for me. If you position your bars for tops and hoods then the shifter pods may suit you better.
You can see pics of some of my experiments in my albums. If you'd like to try the enlarged clamp shifter pods then PM me, they've got cables etc. If you want to keep them then we'd need to work out a price, if you break them you pay
, but if they don't suit just send them back. Easier and cheaper than mangling a set yourself just to find out they don't suit you.
A little search on here under my username will turn up a mind numbing amount of garbage on bars, stems, what fits what, etc