Yeah, like Wenbo said above me, there are other options if you're high dex. Commence random info that you may or may not care to read.
Spoiler
If you have 95 DEX total, you can try to get ahold of a Night Raven's Wing, which is one of the fastest 2h swords in Maplestory... however it'll likely come at a steep price. It's 96 att, 2 str clean, and it only available through forging by the CWK Ninja Clan, and one of the components (Raven's Wing) is only available through an exchange-quest in CWK.
If you have 120 DEX total, you could go the Stonetooth Sword option. Stonetooth Sword (also called Rigbol) is also one of the fastest 2h swords, but the 120 DEX requirement is a turnoff. It's average 101 attack base, and drops from Tengu/Black Crow. It also sports a high price if you were to buy it.
If you don't have obscene amounts of DEX, you have three choices, the ones above: Dragon Claymore, Reverse Nibleheim, Devil's Sunrise.
Reverse Nibleheim: Level 120, available through Maker. You'd need 45 Pieces of Time to do forge it with Maker, which would either require a lot of money, or a lot of time on your hands to hunt them in Temple of Time. If you forge it well, though, it will yield the highest attack/str of any of the weapons, but it's slower than both Night Raven's Wing and Stonetooth.
Dragon Claymore: Level 110, available through Maker, or purchase. They drop from Horntail too, but that's not exactly an option for you, unless you have very nice high-level friends. This is the happy median... if you manage to forge one with Maker, it will be close to what you would achieve with a Nibleheim, perhaps 10-ish attack lower, but like others have said, it's awful to find the Dragon Scales and Spirits. If you buy one, be prepared to face a moderately high price; not as high as Stonetooth or Night Raven's Wing, but more than a Devil's Sunrise.
Devil's Sunrise: Level 90, available through Maker, purchase or monster drop at HH, Zakum, Memory Trainees, Anego, Jr. Newties and Dark Cornians. This is the cheapest and easiest option you've got, and wouldn't be awful either. I'd suggest Makering one, if you've got the funds/resources to use a Diamond/Power Crystal on it, all the better.
If you want a tl;dr:
I'd suggest using a Devil's Sunrise due to the simplicity of getting a hold of one. Make/buy a moderately good one, preferably something with around 105-110 attack, and use that until you can either get the funds for a Rigbol/Night Raven's Wing it you've got a lot of DEX or a Nibleheim/Claymore if you don't.
