Dark Eldar Reaver jetbikes: a few questions

I've finally begun assembling my Dark Eldar. I have old and new Reaver Jetbikes. And quite a few at that as i have 2 old battleforces and 2 new ones.
I was wondering though... how do you guys field them? Is it worth investing in a leader? And are there some 'must-take' weapons?

I also wondered about the old Reaver Jetbike. It comes with an extra blade fan but it has a pin implying that it can either go in the weaponslot or the baseslot... neither seems logical to me. Should I just file of the little nob attached to this extra little bladed fan and randomly glue it on or is it supposed to represent something specific? (it's piece 9 on the old Reaver Jetbike sprue)

Thanks for the help to this newbie!

The Arena Champion is an ok upgrade, as it gives them a boost in leadership. Reavers that fail morale are falling back 3D6, and considering they can be taken in small numbers, morale checks can be common once they get shot at. Go for it if you have the points spare I'd say. It's useful, but not essential.

Heat Lances or Blasters are a must in my eyes. To have that much manoeuvrability on an awesome weapon is brilliant, and it makes them an extremely diverse unit. Bladevanes for anti infantry, then special weapons for anti tank, and a terminator or 2!

Haven't used the Cluster Caltrops and Grav Talon. The General consensus seems to be that they aren't worth it. 20 points for the Caltrops is nearly another Reaver... But others may disagree...

8 reavers, 3 heatlances
1 arena champion, venom blade - 249

OR

8 reavers, 3 blasters
1 arena champion, venom blade - 258

Reasoning.

Thanks guys! Any of you recognize the enigmatic bit nr 9 i referred to?

Glue it as you like. if you like. It was made during the old set of rules and special wargear. Nowadays nobody never recognizes what wargear DE have glued on the models.

Hi Darthvegeta800! That piece is I believe an optional bit to cover a hole in the underside of the jet-engine/quad blade area. I have many of those pieces leftover. That same hole also doubles as the insert point for the plastic rod. The older reavers are still very cool models and personally I think that they hold up well against the new models. The only downside is the pilot's head which never seemed to mould together very evenly and when painted appears to be lop-sided.
If you cover the insert hole, you can carefully drill a spot into the underside of the fairing for the rod to go in. This will make for a better balanced model like the new ones which are a dream to put together. To get around some of the balance issues of the older models, I stuck small stones on the back of the reaver bases as they were constantly tipping forward with the slightest of knocks.

Thanks for the info!