For F2p it would be the Rune 2Hander as it has the highest str bonus, but i prefer the scimitar:D
Saradomin sword or Dragon scimitar are popular.
the most expensive: blue partyhat the most useful combat weapon: corrupt dragon scimitar
Weapons don't add to your defence bonuses. The best armour, however, would be full rune.
Armour - Corrupt Dragon or Rune. Amulet - Enchanted Ruby Amulet (Amulet of Strength) Gloves - The ones you get from Stronghold of Player Safety. Boots - The ones you get from Stronghold of Security. Ring - Explorers Ring (as high as you can wear).
The corrupt Dragon 2h is best tradable weapon on F2p, although is degrades rather fast. The Gravite 2h is not purchasable with gold, rather Dungeoneering tokens, and also degrades, but is the best weapon in Free-to-play.
Probably the Rune battleaxe, though the Warhammer is slightly stronger against plate armor.
Dragon scimitar - Strength xp Abyssal Whip - Attack xp (over 2m) Saradomin Sword (best strength training weapon at 10m) Godsword - (fail at training) D scim ftw!@!@!
The most expensive drop you can get on runescape is the corrupt dragon battleaxe at 3.9m
The Rune 2h Sword has the highest attack statistics. It requires level 40 Attack. It's attack statistics are: Stab: -4 Crush: +50 Slash: +69 Magic: -4 Strength: +70 The price varies between 44,400gp - 49,000gp
The scimitar is a good all round weapon. For your level a mithril one will probably suffice.
Dragon claws
Gravite shortbow.