Westvleteren clone + ????

I'm planning on brewing a Westvleteren clone and try out doing parti-gyle brewing technique getting 2 beers from one mash. I'm using this rather simple recipe for the Westvleteren clone:

15 lbs Pale Malt (2 row) Belgian
15 lbs Pilsner (2 row) Belgian

6 lbs candi syrup D-90
1.5 oz Northern Brewer @ 90
2 oz Hallertauer Hersbrucker @ 30
2 oz Styrian Goldings @ 30
white labs Abbey ale yeast

The question is what would make a good 2nd beer. I was thinking something along the lines of a IPA, but should I just added a different/more agressive hop schedule and yeast or do I need to a grain steep to the wort to provide some additional character to get something closer to an IPA

Any thought?

IPA could work. I might try a saison. Seems like a pretty versatile base to work from.

Depending on the gravities, and since your second beer would be all base malt, I would consider adding some table sugar or corn sugar, and going for a Golden Strong or a Tripel or something along those lines.

Thanks for the feedback. I'm going with creating kind of a Black Belgian IPA for the second beer. Mostly because the other guys that I brew with all like IPA's. I'm going to steep in the wort from the mash, a grain bag with

8 oz of Crystal malt 90L,
6 oz of Carafa II, and
6 oz of Chocolate Malt.

Then do a hop schedule with

1.0 oz Summit @ 60,
1.0 oz Chinook @ 15,
1.0 oz Centennial @ 10,
1.0 oz Cascade @ 5, and
1.0 oz Centennial @ 0.

Not sure what OG, I'll end up with but hopefully it will taste ok