30,000 nx :d

So umm I recently received 30,000 NX for Christmas
And I would like to spend it on only useful things, because I almost NEVER get NX, and carry on just fine in Maple..
In other words, I would only like to purchase permanent things like hair/eyes/gachapon or anything thats EXTREMELY worth it!
So, maybe you can help me!

My active characters:
Khaini-
A 70 Marauder (Has Permanent White Tiger Pet, Black Metro Hair, Purple Innocent Eyes)
A 60 Night Walker (No NX spent, will only play if im REALLY bored of all othe characters xD)
A 47 Aran (No NX spent)
And about 140m or more $ .. decent equips.. no more valuable items/scrolls/etc to sell in my shop =/

I also play in Galicia ..
I have a 38 Lukless Cleric (No NX spent)
And a 20 Gunslinger (No NX spent, dont bother)

There? LOL I have like under 20k in mesos.. hopefully my Karstan will sell x_X

Basically NOW I am playing my Khaini Aran and my Galicia Cleric and I'll see which one I stick to..
Nonetheless, I will be staying active in Khaini and Galicia.. but I am not sure which more.. yet..

Thanks guys, I hope you give me the right choice ^^
Please, do ask more questions if I haven't given you my complete situation xP