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Using 2X aperture guideline, a 130 mm scope should be able to handle 260X if the conditions will allow it.
Some prefer to have a series of eyepieces for each mag and some prefer to have half as many eyepieces and a 2X barlow. A 6.5 would give you 100X. Barlow it to 200X. 4.5 would give you 144X. Barlow would take you to 288X
Of course nothing prevents you from going higher. Just using the 2X aperture as the benchmark.
I have been told the Celestron X-cel is the same eyepiece under a different label. I can't confirm it but the Celestron seem to be lower cost. FWIW.
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