Plant virus isolate assembler

I have a data set of plant viruses contaminated leaves. After filtering out the chloroplast sequences, I’m looking out for a good assembler to assemble the genome of the virus which is a dsDNA virus. I’ve looked for SPAdes but it looks like it cannot do the job, and in the literature people for in this type of analysis use a lot seqman pro. I’m looking for an open source alternative. Any help will be appreciated.