I would recommend Double End Bypass tubes. You will need to bypass your existing ballast (wire your line voltage to your sockets). Definitely go for an online guy and get a quote. Green Electrical Supply offers great discounts on quotes. They can also suggest what you should be using. They do...
MaxLite is also now producing high lumen A-line lamps that look like regular bulbs just physically larger. You can find them on Green Electrical Supply's website. Part number is 102728 for the 26W 5000K 3200 Lumen version.