which license to use for software using components with GPL, LGPL and EPL?

[Ian Vernon]

We are writing a software platform that uses components that are licensed
udder GPL, LGPL and EPL. Both FSF and EF claims that GPL and EPL are not
compatible, while we want to release the software platform as open as
possible we would not want to redo 18 calendar months (I know we should have
checked license conditions early on) of work due to a potential license
incompatibility between GPL and EPL. From various posting the
incompatibility seems to have risen from the definition of derivative works.
Having said what do you think are our choices for licensing?
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