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Get the 2" as you will one day want a 2" EP and being able to use that 30mm or 40mm EP with a barlow is an advantage.
A 40mm wide field 2" eyepiece with a 2x barlow gives you a 20mm with similar characteristics of the 40mm. eg wide field , eye relief just higher magnifications.
I use my 2" EP's like this all the time even though I have numerous 11/4"EP that cover that range.
I just enjoy the easier viewing offered this way with the bigger glass.
If your on a budget the 2x GSO 2" barlow's are a bargain and come with a 11/4" adapter.
If your budget can afford it a Televue Powermate is better than a barlow , but they are expensive.
There are copies of a PM from Siebert Optics and Meade not wanting to miss out have jumped on the band wagon as well apparently .
The only reason not to get a 2" barlow would be you only have a 11/4" focuser or weight is a real problem in your scope.
Any others??
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