... hopefully third times the charm

Stopped by a shop that's a little out of the way for me to pick up some
LoTR Dwarf Warriors (one of the 24 model boxes) and got to talking with the owner and mentioned that I had dabbled in Flames of War in the past. Borrowing the store copy of
Market Garden I tweaked my Grenadier Guards Armoured Squadron list that I had been working on. Here's my list:
Grenadier Guards Armoured Squadron
Guards Armoured Squadron HQ
Company
HQ w/ 2 Sherman V Tanks @ 170 Pts
Guards Armoured Platoon
Guards Armoured Platoon w/ 2 Sherman V and 2 Firefly
VC Tanks @ 435 Pts
Guards Armoured Platoon
Guards Armoured Platoon w/ 2 Sherman V and 2 Firefly
VC Tanks @ 435 Pts
Guards Recce Patrol
Guards Recce Patrol w/ 3 Stuart
VI Light Tanks@ 160 Pts
Guards Motor Platoon
Guards Motor Platoon w/ 3 Motor Squads (one half-track outfitted with .50 cal
AA MG) @ 160 Pts
Light Anti-Aircraft Platoon (SP) Royal Artillery
Light Anti-aircraft Platoon (
SP) Royal Artillery w/ 2 Bofors 40mm
SP@ 85 Pts
Field Battery (SP) Royal Artillery
Field Battery (
SP) Royal Artillery w/ 1 Gun Troops (4 Sextons), captured Sd Kfz 251/1 half-track and 15 cwt Trucks @ 260 Pts
Air Observation Post
Air Observation Post w/ 1 Auster AOP @ 25 Pts
Grand Total: 1,730 points
Any thoughts on what to spend the last 20 points on? Right now I'm considering either four
AA MGs or two
AA MGs and a Sherman ARV.
I've also considered dropping the two extra Fireflys for a Column Platoon (but which configuration?) or maybe replacing the Guards Recce Patrol with a Guards Armoured Car Platoon with two Daimler I armoured cars and two Daimler Dingo scout cars.
Also a quick question. Since I'm using Sextons, is there a cheaper alternative to the
British Artillery HQ that I can use since I won't need the two observer rifle teams and the two
OP carriers? Thanks.