With 140M, you're looking at 3 decent sets of armour, one for each side of the combat triangle.
Armour
Melee : I'd personally use bandos with that budget, as you can't quite afford torva, but that's degradable armour anyways.
Range : You can afford pernix if you only want to use ranged, but I wouldn't recommend it. I'd personally either get a set of karils or armadyl, as they both provide really good stats.
Mage : You can also afford virtus (if you don't want the wand & book), however I wouldn't buy that. I'd go and buy ganodermic, as it's actually really good, cheap to repair and makes a massive difference compared to mystic/ahrims.
Weapons
Melee: Yet again, this highly depends on what you want to have left over. I'd choose to use choatics if you enjoy dungeoneering, but if you want a really expensive good quality weapon, get drygores at around 40m. They are the best weapons and with the offhand variety being around 20m also you've got the best weapon setup by far. However, they are expensive and degradable, but you can get them as drops from the kalphite king.
Range : A zartye bow is a good choice, but so is crossbows if you prefer them. You've got dual chaotic crossbows to choose from, or the royal crossbow if you think you can cope with the queen black dragon. Dragon crossbows are also a cheaper alternative.
Mage : Armadyl staffs, polypore staffs, staff of light and virtus wands are all a good weapon, and the polypore is really effective against dragons. It's most people's mage weapon of choice.
