My WH has quite a substantial bull bar, and we tow a caravan.
Rear HD King springs and USA Monroe load bearing shocks
Front HD King springs and USA Monroe struts.
The jeep sits pretty level when towing and loaded up to max see picture. Jeep was probably a little over at 3000kg and caravan 2800kg ball weight 320kg.
This is another option a friend of mine has installed
complete strut sets from USA
http://www.ebay.com.au/itm/PAIR-BRAN...item1c4f4315d2
He is happy with the result and rear still has standard springs with Monroe USA load bearing shocks.....he tows a caravan heavier than mine ATM 3200